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LCD display value no response??

 
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haowhaow



Joined: 07 Feb 2011
Posts: 1
Location: MY

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LCD display value no response??
PostPosted: Mon Feb 07, 2011 10:09 pm     Reply with quote
I'm newbie in programming. I'm using pic18f4520 and 16 x 2 lcd.
After simulation is ok, but in real device, my lcd is blank.
I don't know how to configure my code. Can anyone here help me to solve it ?

Here is my code:
Code:

#include <18F4520.H>
#fuses HS,NOPROTECT,NOLVP,NOWDT
#device ADC=10         //10-bit conversion
#use delay(clock = 20000000)

#include "lcd.c"
   
void main()
{
   float temp, lsb;
   int8   msd, lsd;
   
   lsb = 5000.0/1024.0;               //lsb in mv
   
   lcd_init();                        //initialize lcd
   
   while(1)                        //do forever
   {
      setup_adc(ADC_CLOCK_INTERNAL);      //ADC clock source
      setup_adc_ports(ALL_ANALOG);      //ADC inputs
      set_adc_channel(0);               //select RA0

      delay_ms(100);
      temp = read_adc();               //get temperature

      /*convert reading to temperature*/
      temp = temp*lsb;            //temp in mv
      temp = temp/10.0;            //temp in degree C

      msd = temp;                  //msd digit
      lsd = 10.0*(temp-msd);         //lsd digit

      printf(lcd_putc,"\fTemp.: %U.%U C", msd,lsd);

      delay_ms(500);

   }   

}
tmsenthil03



Joined: 27 Feb 2011
Posts: 4
Location: chennai

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PostPosted: Mon Feb 28, 2011 8:04 pm     Reply with quote
setup_adc(ADC_CLOCK_INTERNAL); //ADC clock source
setup_adc_ports(ALL_ANALOG); //ADC inputs


please mention above two lines are in the main loop not in the while loop...

And also check the LCD interface port what they have mention in the LCD.C header file

M.Senthilkumar
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